While standing watch underway on a ship with marine gas turbines shown in the illustration, a fire emergency stop is initiated when __________. Illustration GT-0017

Correct Answer: Option D — All of the above

Gas turbine fire protection systems are designed with redundant triggers to ensure immediate shutdown. Activation of the CO2 system, manual emergency stops on the module, or UV flame detection sensors all initiate a fire emergency stop sequence, which cuts fuel and air to the engine to suppress the fire hazard.